OH! is a sculpture created by PJRC forum member brendanmatkin and the Tangible team, which controls the lights on the Telus World of Science’s geodesic dome.

Based on the Teensy 3.5, OH! is a 1:60 scale model of the building, covered with 240 sensors, and connected to its full-scale counterpart by an LTE router.

When the sensors are interacted with, the corresponding light on the “real” dome is illuminated with various animations, such as sparkles, bands, and waves. PCA9617 I2C bus repeaters connect the 240 sensors, with a WIZ820 network module providing Ethernet. The Teensy also outputs an OSC signal on the LAN for the remote laptop to turn into music via Pure Data. Each sensor features an ATtiny841 microcontroller, an LED, and an IR sensor. Marvel as the Vancouver public animates the skyline with their very own hands in the video below.